lwIP provides debug information. The following table lists all the available options.
| Attribute | Default | Type | Description |
|---|---|---|---|
| lwip_debug | false | Boolean | Turn on/off lwIP debugging. |
| ip_debug | false | Boolean | Turn on/off IP layer debugging. |
| tcp_debug | false | Boolean | Turn on/off TCP layer debugging. |
| udp_debug | false | Boolean | Turn on/off UDP layer debugging. |
| icmp_debug | false | Boolean | Turn on/off ICMP protocol debugging. |
| igmp_debug | false | Boolean | Turn on/off IGMP protocol debugging. |
| netif_debug | false | Boolean | Turn on/off network interface layer debugging. |
| sys_debug | false | Boolean | Turn on/off sys arch layer debugging. |
| pbuf_debug | false | Boolean | Turn on/off pbuf layer debugging |
| dhcp_debug | false | Boolean | Turn on/off DHCP debugging |
| acd_debug | false | Boolean | Turn on/off ACD debugging |
Note: To display relevant debug messages,
lwip_debug
must be enabled before any other debug flags.